LTC1522 Linear Technology, LTC1522 Datasheet - Page 8

• Manufacturer Part Number: LTC1522
• Description: Micropower/ Regulated 5V Charge Pump DC/DC Converter
• Manufacturer: Linear Technology

LTC1522
TYPICAL
RELATED PARTS
PART NUMBER
LTC1144
LTC1262
LTC1514/15
LTC1516
LTC1517-5
LTC1555/56
LTC660
8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417 [phone]
FAX: [phone] TELEX: 499-3977 www.linear-tech.com
APPLICATION
DESCRIPTION
20mA Switched Capacitor Converter for Up to 20V Inputs
5V to 12V Regulated Switched Capacitor Converter
Step-Up/Step-Down Switched Capacitor DC/DC Converters
Micropower, Regulated 5V Charge Pump DC/DC Converter
Micropower, Regulated 5V Charge Pump DC/DC Converter
SIM Power Supply and Level Translator
100mA CMOS Voltage Converter
CONTROLLER
Programmable 5V/3V SIM Interface Supply for GSM Cellular Phones
GSM
3V
U
+
10 F
A
B
1
2
7
4
D1
NC
V
SHDN
C
R1
470k
IN
+
LEVEL SHIFT
LTC1522
0.22 F
V
GND
OUT
NC
C
–
8
3
6
5
Q1
+
COMMENTS
Includes Micropower Shutdown (8 A)
Up to 30mA at Regulated Output
V
I
LTC1522 Without Shutdown and Packaged in SOT-23
Step-Up/Step-Down SIM Power Supply and Level Translators
5V to – 5V Conversion with Low Voltage Loss
OUT
IN
2V to 10V, V
10 F
= 20mA (V
TRUTH TABLE
RST
CLK
V
(SEE TRUTH TABLE)
D1 = BAS70-05
Q1 = Si6943DQ
V
A
I/O
0
0
1
1
IN
CC
GND
CC
OUT
= 5V OR 3V
B
0
1
0
1 SHUTDOWN
2V), I
is Fixed or Adjustable, I
SIM CARD
NOT USED
OUT
V
3V
5V
CC
= 50mA (V
1522 TA03
LINEAR TECHNOLOGY CORPORATION 1997
1522f LT/TP 0198 4K • PRINTED IN USA
IN
OUT
3V)
to 50mA